.Divv{
    width: 100%;
    height: 100%;
    background-color: skyblue;
    position: absolute;
}
.formtable{
    position: absolute;
    margin: 0 auto;
    width: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);  
    background-color:white;
    padding: 30px 80px;
    border-radius: 20px;
}